Warum ist MyBase.MyBase nicht möglich?

Warum ist 'MyBase.MyBase' nicht möglich?
<URL:https://dotnet.currifex.org/dotnet/faqs/baseofbase/de/>
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Why is 'MyBase.MyBase' not allowed?
In Visual Basic .NET, C#, and Java access is resticted to the direct base
class. The main reason for this is that allowing access to a class'
grandbase could lead to inconsistencies in an object's state. The sample
below illustrates such a case:
\\\
Public Class A
Private m_Sum As Integer
Public Overridable Sub Add(ByVal Number As Integer)
m_Sum += Number
End Sub
End Class
Public Class B
Inherits A
Private m_Checksum As Integer
Public Overrides Sub Add(ByVal Number As Integer)
MyBase.Add(Number)
m_Checksum = ...
End Sub
End Class
Public Class C
Inherits B
' Objects of type 'C' are objects of type 'B' too. 'B' guarantees
' that the checksum will be set properly. If there was a way to call
' 'A''s 'Add' method directly, the checksum set in 'B' would not be
' updated and thus the class' state would be inconsistent.
End Class
///
'MyBase.MyBase' could be used to bypass code that is "required" by the
class hierarchy, for example, if the derived class calls a function defined
in its grandbase class directly, bypassing a base function, where the base
function is needed for the entire hierarchy to function correctly.